Figure 4.
Adjusted survival curves for 1q status in the posterior fossa tumors from multivariate Cox proportional hazards regression analysis using histology, adjuvant therapy, extent of resection, and age (<3/>3 years) as variables. Tumors with gain of 1q are shown by a dotted line and tumors without gain of 1q are shown by a solid line. Patients receiving no adjuvant therapy, unknown adjuvant therapy, or chemotherapy alone were removed from this analysis because these groups were too small to be reliably analyzed (n = 11). Tumors with gain of 1q had a worse outcome than those without gain of 1q (P = 0.1).